Improvement in heaters



z sheets-sheet z."

J'. E. GRIDLEY.

HEATER.

Patented. June 13, 1876.

mttorneys IL PEIERS, FHOTO-LITHOGRAPHE UNITED STATES PATENT OFFICE.

JAMES E. GRIDLEY, OF ST. PAUL, MINNESOTA, 'ASSIGN-OR OF ONE-EIGHTH- HIS RIGHT TO FREDERICK W. FROHUE, OF SAME'PLAOE.

IMPROVEMENT IN HEATERS.

Specification forming part of Letters Patent No. 1 78,764, dated J rule 13, 1876; application filed May 24, 1876. 7

To all whom it may concern:

Be it known that I, JAMES E. GRIDLEY, of

St. Paul,in the county of Ramsey, and in the construction and arrangement of the internal portions of a stove or heater, thepeculiarities of which will be hereinafter set forth.

In the accompanying drawings, making part of this specification, Figure 1 represents a section, and Fig. 2 a plan view, with the top of the stove removed, as also an inside drum.

In the figures, A represents the shell of the stove, which may be made either ofsheet or cast metal, and of any suitable size and shape, although I prefer that in shape it should be cylindrical. B is the base of the stove. D D represent air-flues, and in this case I use four. At bottom these flues pass through the base B, and at top they enter a hot-air chamber or reservoir, E, for the purpose of conveyingjcold air from beneath the stove through the fire-chamber C and into the reservoir E. Within the reservoir is placed a diaphragm, F, which is provided with feet a a upon both its upper side and under side. The feet upon the under siderest upon the bottom of the reservoir, and keep it a suitable distance from it. The feet upon the upper side support ahot-air drum, I. An opening, H, is made through the center of the diaphragm, and upon each side of this hole are a series of smaller holes, which are covered by the flaps or valves G G. The diameter of the drum I is smaller than-thatof the vreservoir, so that hot air can pass up between the two. The drum I culminates in a dome, J, which has in its apex an air opening, a. The drum may be closed at its bottom, or may have smaller openings in the bottom than in the top, so that a hot-air cushion may be formed in said drum for radiating as well as retaining heat.

K represents a capping-dome, the lower end of which rests upon or against the upper end of the reservoir E, and serves to convey the hot air into the room to be heated, its upper end being open.

The products of combustion pass up and around the reservoir, and out at the smokepipe M.

Air may be introduced into the flues D D either from the room in which the stove is placed, or from the open. air.

When the air passes into these flues it commences to be heated, as they are in direct contact with the fire.- It passes up and strikes the under side of the diaphragm, and passes to its center, and through the hole H; then strikes the under side of the drum I, passes around it, and then up through the dome-cap K and into the room. v

When the air becomes very hot beneath the diaphragm the flaps G G are raised by expansion of a small brass plate, which is secured to its under side, and the end of which works or presses against an arm attached to the flap. I may or may not use these flapsf as a general thing, as in many instances they can be dispensed with,

The several parts of the stove may be read-- ily removed for the purpose of cleansing them, and the construction is simple, and, consequently, cheap.

When the valves are used it will be seen that cold air is brought through the fire-box into'a' hot-air generator or reservoir, and there retained by the wing-valves until heated, when, by its expansion, it will open the valves and pass out in a heated state at the top.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is v The shell A, inclosing the flues D D and reservoir E, and in combination therewith the diaphragm F, the drum I, and the domecap K, for forming a heating apparatus, the several parts being constructed substantially as and arrangedto operate in the manner set forth. 7 y a In testimony that'I claim the foregoing I have hereunto set my hand this 23d day of May, 1876.

JAMES E. GRIDLEY..

Witnesses J. M. MASON, M. L. SrrowELL. 

